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Re: Extinction
At the risk of sounding tedious, I would point out the following
definitions for clarity:
meteorite - a small rocky body from pinhead to several tons of extraterrestrial
origin that enters the Earth's atmosphere.
meteoroid - a meteorite beyond the Earth's atmosphere. Large ones are called
asteroids.
meteor - a streak of light caused by the fall of a meteorite.
bolide - a meteor that explodes while in the air.
fireball - a meteor of -4 magnitude (brightness of Venus) or more.
Of these only a meteorite touches ground.
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^ ^
^ _/ _/_/_/ _/ Richard "Rik" Hill ^
^ _/ _/ _/ _/ Sr. Research Spec. ^
^ _/ _/ _/ _/ Catalina Sky Survey ^
^ _/ _/ _/ _/ Planetary Occultations Group ^
^ _/ _/_/_/ _/ Planetary Atmospheres Group ^
^ _/ _/ _/ LUNAR & PLANETARY LAB. ^
^ _/ _/ _/ Univ. of Arizona ^
^ _/_/_/_/ _/ _/_/_/_/ Tucson, Az 85721 ^
^ (520) 621-4077 ^
^ ^
^ rhill@lpl.arizona.edu ^
^ http://www.lpl.arizona.edu/~rhill ^
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